hg: valhalla/valhalla/jdk: Adjust TOS state for checkcast

[david.simms at oracle.com]

Changeset: b6a4294ce649
Author:    dsimms
Date:      2017-09-20 14:52 +0200
URL:       http://hg.openjdk.java.net/valhalla/valhalla/jdk/rev/b6a4294ce649

Adjust TOS state for checkcast

! src/java.base/share/classes/jdk/experimental/bytecode/BasicClassBuilder.java
! src/java.base/share/classes/jdk/experimental/bytecode/CodeBuilder.java
! src/java.base/share/classes/jdk/experimental/bytecode/TypedCodeBuilder.java